18.計算(4639)16-(2BCA)16=
(A) (7202) 16
(B)(2B09) 16
(C)(1A6F) 16
(D)(6202) 16
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統計: A(2), B(12), C(115), D(4), E(0) #1974492
統計: A(2), B(12), C(115), D(4), E(0) #1974492